How to access nodeXL objects from VBA

I am using the nodeXL Social Network Importer to obtain Twitter data in Excel. I would like to allow users to dynamically input which Twitter user is searched, and I need to use VBA to do add this functionality. However, I am unsure how to use VBA code
to access nodeXL objects like the Twitter User searched in the "Import from Twitter Users Network" box. I assume that this is an object that I can call in VBA.